Now that Strong Looks Better Naked has hit shelves, we know all about the reality star’s struggles with her weight, self-image and relationships, all in her own words. One thing she doesn’t shy away from? Her relationship with her reclusive brother, Rob Kardashian.

In the book, Khloé isn’t exactly nice to Rob. In fact, what she says about him sounds an awful lot like she’s predicting he’ll fail in his journey with his depression and his weight loss, two well-publicized issues that seem to go hand-in-hand for Rob. Check out the excerpt from the book.

“Take my brother Rob. I love him and he knows I love him, but he fell into a deep, dark place and couldn’t find his way back. I’ve tried to help him, as has the entire family, but our efforts have largely been in vain. From time to time, though, he decides he’s going to fix things his way, and he plunges in headfirst. Inevitably, it doesn’t work.”

Regardless of how rude Khloé sounds in her book, Rob doesn’t seem to be taking it to heart. Even after publicly butting heads with his famous family in the past (and even threatening to sue them over the way he was portrayed on their reality series, Keeping Up with the Kardashians), Rob has nothing but good things to say about his sister’s literary work.

“I’m in love with the Koko!!!” he wrote alongside a snap of the book’s cover, which he shared on his Instagram on Tuesday. “Check out my BEAUTIFUL Sister’s new book, out TODAY #StrongLooksBetterNaked GET IT NOW!!”

Rob also gave his followers a link to buy the book.

It’s not the first time Rob has been supportive of his family in recent weeks. Despite all their past feuding, he’s used Instagram to send sweet messages of support to Lamar Odom, amid his health crisis, and Kim Kardashian on her birthday. Sign of a new leaf for Rob? It could be.